I have easily had a full day with battery to spare at the end of the day, with only a few exceptions. I had one bad day yesterday. I think something got stuck running in the background so it was running warm all the time, and it was draining faster than I could charge in in my car. Rebooting made no difference, so I looked in settings under battery usage to see what was using the most battery. I temporarily changed an app to not run in the background, and it cooled down and my problems were resolved. I allowed it again this am, and all has been fine. I am guessing there are still some glitches and some people who are having battery issues may just have something with apps running in the background. It is strange that rebooting my phoned did not fix it, though.